风电叶片单点疲劳加载过程数值仿真与试验

发布时间：2018-04-22 11:16

本文选题：风电叶片 + 疲劳加载系统　；参考：《振动.测试与诊断》2014年04期

【摘要】：设计了一套风电叶片单点疲劳加载系统,基于拉格朗日方程建立了振动耦合数学模型,对振动特征规律(叶片振幅、电机电流)分别进行数值仿真。当驱动频率与叶片固有频率偏差较小时,固存的机电耦合现象会导致叶片振幅稳定,若偏差增大,叶片振幅则发生剧烈波动。加载源电流跟随叶片振动产生周期性波动,且转速越大,等负载下的电流相对越大,共振时电流达到最大。建立了一套单点疲劳加载试验系统,对振动过程中的叶片振幅和电流进行测试。试验结果验证了数学模型与仿真模型的准确性,该结论为疲劳加载解耦控制算法的制定提供了理论依据。
[Abstract]:A single point fatigue loading system for wind turbine blade is designed. The coupled vibration mathematical model is established based on Lagrange equation. The vibration characteristic law (blade amplitude and motor current) is numerically simulated. When the deviation between the driving frequency and the natural frequency of the blade is small, the electromechanical coupling phenomenon will lead to the stability of the blade amplitude. If the deviation increases, the amplitude of the blade will fluctuate violently. The load source current fluctuates periodically with the blade vibration, and the higher the rotating speed, the larger the current under equal load and the maximum current at resonance. A single point fatigue loading test system was established to measure the amplitude and current of the blade during vibration. The experimental results verify the accuracy of the mathematical model and the simulation model. The conclusion provides a theoretical basis for the formulation of the fatigue loading decoupling control algorithm.
【作者单位】：山东理工大学机械工程学院;
【基金】：国家自然科学基金资助项目(51305243,51405275)
【分类号】：TM315

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